Maybe… I found battery grips to be completely useless for me. A battery grip allows you to hold a camera vertically without twisting your hand around, and stores one extra battery pack doubling your shooting endurance.
On my Olympus E-3 I can comfortably get 400~500 shots from one battery pack. Shooting like crazy, I struggle to reach 600 shots in a day. Even for all day events like weddings, I’m finding that there’s often a break in between with plenty of time to switch batteries. I always carry an extra in my slingbag.
On a few cameras, the battery grip will allow for faster FPS when shooting bursts. For most people it’s little more than a great big battery holder.
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